AppLifecycleProbe

Collects an AppLifecycleEvent each time the app lifecycle state changes.

Observes WidgetsBinding while resumed.

Inheritance

• Object
• AbstractExecutor<Measure>
• Probe
• StreamProbe
• AppLifecycleProbe

Mixed-in types

• WidgetsBindingObserver

Constructors

AppLifecycleProbe

AppLifecycleProbe()

Properties

stream

1. @override

Stream<Measurement> get stream

override

The stream of Measurements to forward. Implemented by subclasses.

Read on the first resume after creation or a pause.

Methods

didChangeAppLifecycleState

1. @override

void didChangeAppLifecycleState(

1. AppLifecycleState state

)

override

Called when the system puts the app in the background or returns the app to the foreground.

An example of implementing this method is provided in the class-level documentation for the WidgetsBindingObserver class.

This method exposes notifications from SystemChannels.lifecycle.

See also:

• AppLifecycleListener, an alternative API for responding to application lifecycle changes.

onPause

1. @override

Future<bool> onPause()

override

Called by pause. Returns true if successfully paused.

If false, the state is not changed.

onResume

1. @override

Future<bool> onResume()

override

Called by resume. Returns true if successfully resumed.

If false, the executor moves to ExecutorState.PausedButShouldBeResumed.